#include "sys.h"
#include "led.h"
#include "delay.h"

 int main(void)
 {	
	delay_init();//初始化延迟函数
	LED_Init();
  while(1)
	{
	LED0=0;
	LED1=0;
	LED2=0;
	LED3=0;
	delay_ms(500);
	LED0=1;
	LED1=1;
	LED2=1;
	LED3=1;
	delay_ms(500);
	}
 }
